A nurse is preparing to administer dopamine 3mcg/kg/min by continuous IV infusion to a preschooler who weighs 41.8 bs. Available is dopamine 400 mg in dextrose 596 in water (D5W) 250 mL. The nurse should set the IV pump to deliver how many ml/hr? (Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
2.1 mL/hr
12.5 mL/hr
35.6 mL/hr
20.2 mL/hr
The Correct Answer is A
Given:
Ordered dose of Dopamine: 3 mcg/kg/min
Child's weight: 41.8 lbs
Concentration of Dopamine: 400 mg in 250 mL D5W
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 41.8 lbs x 0.453592 kg/lb = 18.935 kg
Step 2: Calculate the total dose of Dopamine in mcg/min:
Total dose (mcg/min) = Ordered dose (mcg/kg/min) x Child's weight (kg)
Total dose (mcg/min) = 3 mcg/kg/min x 18.935 kg
Total dose (mcg/min) = 56.805 mcg/min
Step 3: Convert mcg to mg:
Total dose (mg/min) = Total dose (mcg/min) / 1000 mcg/mg
Total dose (mg/min) = 56.805 mcg/min / 1000 mcg/mg
Total dose (mg/min) = 0.056805 mg/min
Step 4: Calculate the total dose in mg/hr:
Total dose (mg/hr) = Total dose (mg/min) x 60 min/hr
Total dose (mg/hr) = 0.056805 mg/min x 60 min/hr
Total dose (mg/hr) = 3.4083 mg/hr
Step 5: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Total dose (mg/hr) / Concentration (mg/mL)
Infusion rate (mL/hr) = 3.4083 mg/hr / (400 mg/250 mL)
Infusion rate (mL/hr) = 3.4083 mg/hr x (250 mL/400 mg)
Infusion rate (mL/hr) = 2.1301875 mL/hr
Step 6: Round to the nearest tenth:
Infusion rate (mL/hr) ≈ 2.1 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","D","E"]
Explanation
A) Anticoagulants:
Anticoagulants, such as warfarin, heparin, and direct oral anticoagulants (DOACs), are specifically designed to prevent the formation of blood clots or to treat existing clots. They work by interfering with various stages of the clotting cascade, either by inhibiting clotting factors or by enhancing the effects of natural anticoagulants in the body.
B) Antihypertensives:
Antihypertensives, such as ACE inhibitors, beta blockers, and calcium channel blockers, are used to lower high blood pressure by relaxing blood vessels, reducing heart rate, or decreasing fluid retention. While antihypertensives can reduce the overall strain on the heart and blood vessels, they do not have an impact on the clotting process and are not designed to interfere with blood coagulation.
C) Antibiotics:
Antibiotics, such as penicillin or amoxicillin, target bacteria and prevent their growth or kill them, but they do not affect the clotting mechanisms in the blood.
D) Antipyretics:
Antipyretics, such as acetaminophen (Tylenol) or ibuprofen, work by lowering the body's set point temperature in the hypothalamus, helping to relieve fever. They do not affect the clotting cascade or the ability of blood to form clots, so antipyretics are a correct answer.
E) Antiemetics:
Antiemetics, such as ondansetron or metoclopramide, are used to prevent or treat nausea and vomiting. They primarily work by blocking the receptors in the brain that trigger nausea and vomiting but do not have an effect on the clotting process. Thus, antiemetics are a correct answer.
Correct Answer is B
Explanation
A) Drug Enforcement Administration (DEA)
The DEA is primarily responsible for enforcing the controlled substances laws and regulations, including monitoring the manufacturing and distribution of drugs that are classified as controlled substances. While the DEA plays an important role in regulating drugs, particularly those that have a high potential for abuse, it is not the primary authority on drug standards or approval processes.
B) Food and Drug Administration (FDA)
The FDA is the primary authority responsible for drug standards in the United States. The FDA regulates the safety, efficacy, and quality of pharmaceutical drugs, vaccines, biologics, and medical devices. It is responsible for approving new medications, ensuring they meet rigorous standards for safety and effectiveness before they are made available to the public. The FDA also monitors drugs after they are approved, requiring post-market surveillance and, if necessary, issuing recalls or safety warnings.
C) Centers for Disease Control and Prevention (CDC)
The CDC is focused on public health and disease prevention rather than the regulation of drugs. The CDC plays an important role in providing guidelines for the treatment and prevention of diseases, offering recommendations for vaccination schedules, and conducting epidemiological research.
D) National Institutes of Health (NIH)
The NIH is a leading medical research organization that conducts and funds biomedical research. While the NIH plays a crucial role in advancing scientific knowledge and supporting the development of new treatments, it does not have the authority to regulate or set standards for drugs.
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